Polyvinylalcohol composite film, preparation method thereof and method of preparing nano composite powder for preparing the polyvinylalcohol composite film

A polyvinyl alcohol and composite film technology, which is applied in the field of nanocomposite powder preparation, can solve the problems of low production capacity, poor mechanical properties of polyvinyl alcohol composite film, easily damaged cast film forming technology and energy consumption

Inactive Publication Date: 2007-08-15
HARBIN INST OF TECH
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the defects of poor mechanical properties, easy damage, large energy consumption and low production capacity of the existing polyvinyl alcohol composite film filled with starch, and sol-gel method and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0008] Specific embodiment 1: The polyvinyl alcohol composite film in this embodiment consists of 120-180 parts of polyvinyl alcohol, 30-90 parts of starch, and 2.0-2.2 parts of nano-ZnO / SiO 2 It is made of composite powder and 85-95 parts of glycerin.

[0009] In this embodiment, the inorganic filler nano ZnO / SiO 2 The addition of composite powder improves the mechanical properties of the film. The tensile strength of the polyvinyl alcohol composite film in this embodiment is 17.50-30.48MPa, which is higher than that without adding nano-ZnO / SiO 2 The tensile strength (17.05MPa) of the composite powder polyvinyl alcohol composite film (with 25wt% starch added) was increased by 17.01%. The elongation at break of the polyvinyl alcohol composite film in this embodiment is 406.25%-462.50% higher than the national standard GB / T4456-1996 (elongation at break ≥ 350%).

[0010] The price of PVA is 13000-13600 yuan / ton, and the price of starch is 1980-2260 yuan / ton. Therefore, this ...

specific Embodiment approach 2

[0011] Specific embodiment two: The difference between this embodiment and specific embodiment one is: the polyvinyl alcohol composite film is composed of 140~160 parts of polyvinyl alcohol, 50~70 parts of starch, 2.1 parts of nano ZnO / SiO 2 It is made of composite powder and 87-93 parts of glycerin. Other steps are the same as those in Embodiment 1.

specific Embodiment approach 3

[0012] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the polyvinyl alcohol composite film is made up of 150 parts of polyvinyl alcohol, 60 parts of starch, 2.1 parts of nanometer ZnO / SiO 2 Composite powder and 90 parts glycerin. Other steps are the same as those in Embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Melting pointaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparing method of polyvinyl alcohol coextruded film and nanometer composite powder body for preparing coextruded film, which comprises the following steps: resolving defect of current adding amidon; allocating 120-180 wt polyvinyl alcohol, 30-90 wt amidon, 2.0-2.2 wt nanometer ZnO/SiO2 composite powder and 85-95 wt glycerin; mixing polyvinyl alcohol, amidon, nanometer ZnO/SiO2 composite powder and glycerin; cooling; melting; squeezing thin film; getting the thin film; adding polyacrylic acid, poly-sodium acrylate or triethanolamine, wetting agent-436, defoaming agent-50A and nanometer ZnO into distilled water; emulsifying; pre-dispersing; dipping into Na2SiO3 and sulfuric acid; aging; depositing; drying; grinding; getting the nanometer ZnO/SiO2. The tensile strength of thin film can reach at 17.5-30.48MPa and elongation at break at 406.25%-462.50%.

Description

technical field [0001] The invention relates to a composite film, a preparation method thereof and a preparation method of nanocomposite powder used for preparing the composite film. Background technique [0002] Polyvinyl alcohol (PVA) is a water-soluble polymer with many unique properties. It has excellent biodegradability, which makes it occupy a unique and very important position in film materials. At present, the sol-gel method and the solution blending method are used to prepare polyvinyl alcohol films, but the current methods limit the production of PVA films due to factors such as low concentration of casting solutions, low production capacity, and high energy consumption. promotion and application. Since the PVA molecule contains a large number of hydroxyl groups, it can form a large number of intramolecular and intermolecular hydrogen bonds, so that the melting temperature (195°C) of PVA is very close to the decomposition temperature (210°C), and it is easy to dec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L29/04C08K13/02C08J5/18B29C47/92C08L3/02C08K3/22C08K3/36C08K5/05B29C48/92
CPCB29C47/92
Inventor 王鹏毛桂洁王丽丽
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap